> For the complete documentation index, see [llms.txt](https://docs.ston.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ston.fi/developer-section/omniston/swap.md).

# Direct API integration

Choose current v1beta8 WebSocket JSON-RPC or gRPC for a custom-language integration.

Use the direct API when you need protocol access in another language or need to manage transport and serialization yourself. New integrations use API v1beta8. The [TypeScript/JavaScript](/developer-section/omniston/sdk/nodejs.md) and [React](/developer-section/omniston/sdk/react.md) SDKs handle connection and subscription plumbing for their respective application stacks.

## Choose a transport

| Transport               | What you implement                                                           | Guide                                                                 |
| ----------------------- | ---------------------------------------------------------------------------- | --------------------------------------------------------------------- |
| JSON-RPC over WebSocket | Request IDs, subscriptions, notifications, errors, and reconnection          | [WebSocket API v1beta8](/developer-section/omniston/swap/overview.md) |
| gRPC with TLS           | Generated protobuf clients, server streams, cancellation, and error handling | [gRPC API v1beta8](/developer-section/omniston/swap/grpc.md)          |

Both use the same trader model: RFQ → selected Quote → the returned swap/order branch → build/sign/submit → settlement tracking. Use [API model v1beta8](/developer-section/omniston/swap/v1beta8.md) for fields and [Settlement lifecycle](/developer-section/omniston/how-omniston-works.md) for completion semantics.

## Inputs and signing

Choose the [environment](/developer-section/omniston/environments.md), [assets](/developer-section/omniston/chains.md#asset-addresses), and source/destination addresses. See [API amounts](/developer-section/omniston/swap/v1beta8.md#amounts-and-fee-fields) for amount fields. Source wallets must support the complete built transaction or the required order-signing mode. Use [TON](/developer-section/omniston/sdk/ton.md), [EVM](/developer-section/omniston/sdk/evm.md), or [TRON](/developer-section/omniston/sdk/tron.md) wallet guidance; adapt generated/wire data to your language and wallet library.

For resolver enrollment, authentication, and quote submission, see [Resolvers](/developer-section/omniston/resolvers.md).

## Existing clients

Use [Versions and migrations](/developer-section/omniston/migration.md) for support status, API/SDK migrations, and the v1beta7 reference.


---

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